The Cr,Tm,Ho:YAG laser device was provided for co-axial positioning of two laser beams along a single axis.The output of each laser rod is combined in turn and interleaved into a single output beam by using a rotatable reflector.The rotary rate of the stepping motor and the pump currents of two lasers are controlled by a single chip microcomputer.The output power is 35.4 W and the end of fiber is 22.7 W when input pump energy is 100 J and repetition frequency is 20 Hz.The coupling efficiency is 64%.This method is not only suitable for the same wavelengths,but also suitable for two different wavelengths.